Accrued expenses and other payables (Details Textual) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	May. 27, 2014	Sep. 30, 2015	Mar. 31, 2015
Accrued Expenses [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.18
Dividends Declared Amount		$ 0.5
Shenyang [Member]
Accrued Expenses [Line Items]
Dividend Payable To Non Controlling Interest			$ 0.3
Dividends Declared Amount			$ 1.1